what tyre pressures should I be running on a 195/50 15" rim? Its for a Locost with a zetec lump and a fatty driving. There was only 20 all round so I put it youp to 25 but thought therws not much weight so maybe it should be softer. I can't do a search from my touchpad but I'm sure its been covered a gazillion times before.

cheers Jon

20 would be closer imho
Why did you put it up?

I didn't know what it should be, just thought it was a little low. Is there an online calculator anywhere to work it out by corner weights?

I run 18psi all round if that helps on 14" but yours should be around that figure too.

is that enough to keep the tyre on the rim then,

16psi in mine, at 18 upwards ther car feels as though the car will slide of the road

between 16-18 psi,

I had better let some back out then.

what wheel size you running Steve?

I have the same size wheels / tyres as you and a boat anchor pinto engine and i have 19psi in them
if i am going to a show on motor ways i put them up to 23 psi
jacko

http://www.locostbuilders.co.uk/forum/52/viewthread.php?tid=157598
Might help

thanks ReMan that's some good info, I will put thm back to 18-19psi all round and try it.

Im running 205/55/13" tyres all front and back

I have the same size tyres as you and run 18psi all round

25 is way too high. I played about with mine on a track day and ended up with them at 14psi cold. Grip was way better than with 18-20 psi.

My car is an Indy with a Zetec engine and had 195/50 Yoko A539s.


Stu